Threshing-machine



J.'E. GROSS. THRESHING MACHINE.

I APPLICATION FILED AUG-19,1918. 1,342,806.

5 SHEETSSHEET l- Patented June 8, 1920.

J. E. GROSS.

THBESHING MACHINE.

APPLICATION FILED AUG. 19, 1918.

1,342,806. I r PatentedJune 8, 1920. I

5 SHEETS-SHEET 2. I

J. E. (380887. THRESHING MACHINE.

' APPLlCATlON FILED AU G.19. 1918- 1,842,806.

SHEETS-SHEET 3.

Patnted June 8, 1920.

J. E. GROSS. THRESHING MACHINE.

APPLICATION FILED AUG-19,1918. 1,342,806. Patented June 8, 1920.

J. E. GROSS. THRESHI NG MACHINE. APPLICATION FILED AUG-19, 191s.

Patented June 8, 1920.

5 SHEETS-SHEET 5- PATENT OFFICE.

JOHN E. GROSS, OF WALLA WALLA, WASHINGTON.

THRESHING-MACHINE.

Application filed. August 19, 1918.

To all whom it may concern Be it lmown that 1, JOHN E. Gross, a citizen of the United States, residing at Valla lValla, in the county of Walla Walla and State of Vashington, have invented certain new and useful Improvements in Threshing-Machines, of which the following is a specification.

This invention relates to threshing machines, of the cylinder-and-concave type, and its object is to provide a simple, compact and highly efficient machine of this kind, characterized by main and secondary cylinders, with a novel form of grate associated therewith, as well as other parts to be hereinafter described in detail.

In order that the invention may be better understood, reference is had to the accompanying drawings forming a part of this specification.

In the drawings,

Figure 1 is a plan view of the machine;

Fig. 2 is an elevation showing one side of the machine;

Fig. 3 is an elevation showing the other side- Fig. 4: is a central longitudinal section;

Fig. 5 is an enlarged detail view of certain grates associated with the threshing cylinders;

Fig. 6 is an edge view showing the method of holding the grate bars assembled;

Fig. 7 is a plan view of the parts shown in Fig. 6;

Fig. 8 is an edge view showing a modified form of grate bar assembly, and

Fig. 9 is an edge view of a grate having flatbars or slats.

Referring specifically to the drawings, 10 denotes the housing of the machine, the samebeing carried by asuitable frame 11 mounted on wheels 12. The housing is dimensioned and arranged to accommodate the various parts of the machine to be presently described. At the front end of the frame is mounted the power source, the same being an internal combustion engine 13. It will be understood, of course, that the machine may also be driven from a distant power source.

On the shaft 1 10f the engine is a sprocket wheel 15 which is connected by a chain 16 to-a. sprocket. wheel. 17 ontheshaft 18 of a specification of Letters Patent.

Patented June 8, 1920.

Serial No. 250,495.

cylinder 19 operating in conjunction with a concave 19.

To the rear of the cylinder 19 is a second cylinder 20 mounted on a shaft 21 having a sprocket wheel 22 connected by a chain 23 to a sprocket wheel 2 1 on the shaft 18.

The grain to be threshed is delivered to the main cylinder 19 by a draper or other suitable type of feeder 25.

Beneath the main cylinder 19 is located a grate on which the grain, after being threshed between said cylinder and its concave 19*, falls by gravity and the centrifugal force imparted by the cylinder. This grate is of special design and is in two sections. The forward section is composed of spaced and parallel straight slats 26 obliquely positioned with respect to the cylinder, while the rear section is composed of spaced and parallel slats 27 which are curved in cross-section, with their concave sides facing forwardly. These slats are held assembled in spaced relation by transverse bolts 28 and spacing sleeves or washers 29.

The grain on the grates 26 and 27 is caught by the wind from a blast fan 30 which catches and throws back the lighter particles, permitting only the grain to fall through the grates and onto the sieves 31 of a vibratory shoe 31 The angle of inclination of the grate slats or bars is such that the wind passing between the front straight slats tends to force the straw and chaff rearward, while the wind passing between the curved rear slats tends to reverse in direction, thus setting up a counter current to thoroughly disturb the straw and chafi'. This action is clearly illustrated in Fig. 5.

The fan 30 is driven from the shaft 18, the latter having a sprocket wheel 32 connected by a chain 33 to a sprocket wheel 34 on the shaft 35 of the fan.

The shoe 31 obtains motion from an cecentric 36 having a flexible rod 37 connected to the shoe, the latter being loosely suspended from flexible straps 38'. The eccentric is on a shaft 39 having a sprocket wheel 40 over which is trained a chain 41 obtaining motion from a sprocket wheel 42 on the shaft 18.

Beneath the sieves 31 is mounted a trough 13 into which the clean grain drops after passing through the sieves. In the bottom of this trough works a conveyer 44 which carries the grain to one side of the machine to an elevator 45 from which latter it drops by gravity into the sacks shown at 46.

The conveyer 44 is driven by the chain 41, its shaft 44 having a sprocket wheel 44 over which'said chain is trained. The elevator 45 is driven from the conveyor shaft in the usual manner.

The outlet of the casing 47 of the fan is so positioned that a blast of air is delivered to the grates 26 and 27, and also to the sieves 31. The blast is also divided so that part of it passes over the sieves to remove any chaff that may have fallen thereon. This action is obtained by a deflector board 48 positioned adjacent to the outlet of the fan casing 47. This board. is pivoted at one end, as shown at 49, and its other end is adjustably supported by a link 50. The board can therefore be'adjusted at any desired angle :to obtain the best result.

The threshed heads and straw leaving the main cylinder 19 pass to the secondary cylinder 2O by which they are beaten and agitated rearward, the blast from the fan 30 acting on the particles as before, but with diminished force due to the greater distance of the secondary cylinder from the fan.

."The blast acts on a diminished quantity and lighter substances, the bulk of the grain having already been removed by the main cylinder 19.

Beneath the cylinder 20 is located a grate 52 arranged and functioning in the same manner as the grate beneath the main cylinder 19.

Tothe rear of the secondary cylinder 20 is located a rotary picker 53 against which the straw and waste is thrown by said cylinder, whereby it is loosened and distributed in thin layers on a rattle-rake 54. This rake is in the form of an endless belt which is agitated by revolving arms 54 to remove any grain from the straw or waste. The

rattle-rake belt passes over rollers 55 and on v the shaft 56 of one of the latter is a sprocket wheel57 over which the chain 41 is trained for driving therake, The agitator arms 54 are on a shaft 58 having a sprocket wheel 59 which is connected by a chain 60 to a sprocket wheel on the shaft 56.

The picker 53 comprises radial arms carried by a cylinder 61 obtaining motion through a sprocket-and-chain gearing 61 from the shaft 21.

cylinder 20 and below the shoe 31 is located a trough 63. The grain from the floor 62 dropping on the sieves 31 contains some cylinder 19 for rethreshing.

through the same due to the vibratory motion of the shoe 81 carrying said sieves, and falls into the trough 43 and is earned by the conveyer 44 to the elevator 45 discharing into the sacks 46.

Between the troughs 43 and 63 is an inclined floor 67 leading to the former. Any chaff which falls on this incline is forced upward and over the top thereof by the blast of air from the fan 30, the air blast being distributed, and led in this direction by the means 48 hereinbefore described, and

'this chaff drops into the trough 63 to be rethreshed or thrown out over the incline 64.

The incline of the floors 64 and 67 is such as to allow the lighter particles to readily travel upward thereon, and as they are lo cated directly beneath the sieves 31, and the latter are beneath the cylinders 19 and 20, the blast can be effectually controlled and only one fan is needed. The two cylinders so thoroughly disturb the straw in connection with the air blast directed by the grates under the same, that separation is almost completely effected before the headings of grain pass the cylinders. A further advantage of the specific form of grates 26 Landbounding grain kernels cannot easily pass back through the grates.

Above the feeder 25 is a feed hopper 68.

The machine is light and compact so that should occasion require, it couldbe placed upon an ordinary wagon bed.

Figs. 6 and ,7 illustrate in detail the manner of connecting the slats of the grate 27. In Fig. 8 a slight modification is shown, the slats being connected by the cross bolts 28 adjacent to their top edges. Fig. 9 shows a grate made up of. fiat bars or slats 26 The feeder 25 is driven by the; chain 41,

the shaft 25" of the former having a sprocket wheel 25 over which said chain passes.

Theconveyer 65 is driven by the chain 41, its shaft having a sprocket wheel 65 over which said chain is trained. I claim 3 1. In a threshing machine, a threshing means, a rattle-rake to the rear of the threshing means, a vibratory sieve beneath the threshing means, a pair of grain collecting troughs beneath the sieve, a wall between the troughs extending from the forward trough with an upward inclination, a

vall extending from the rear trough with an upward inclination and terminating to the rear of the sieve, an inclined floor beneath the rattle-rake and having its lower end positioned to discharge on the rear end of the sieve, andmeans for directing an air blast in the direction of the threshing means and also beneath and past the threshing means between the latter and the sieve, and also beneath the sieve in the direction of the inclined walls.

2. In a threshing machine, a threshing means, a rattle-rake to the rear of the threshing means, a vibratory sieve beneath the threshing means, a pair of grain collecting troughs beneath the sieve, a wall be tween the troughs extending from the forward trough with an upward inclination, a wall extending from the rear trough with an upward inclination and terminating to the rear of the sieve, an inclined floor beneath the rattle-rake and having its lower end positioned to discharge on the rear end of the sieve, means for directing an air blast in the direction of the threshing means and also beneath and past the threshing means between the latter and' the sieve, and also beneath the sieve in the direction of the inclined walls, a conveyer working in the rear trough, and an elevator into which the conveyer discharges, said elevator delivering to the threshing means.

3. In a threshing machine, a cylinder, and a grate beneath the same composed of front and rear sections, the front section comprising spaced and parallel slats set obliquely to the cylinder, and the rear section comprising spaced and parallel slats which are curved in cross-section with their concave sides facing forwardly.

a. In a threshing machine, a cylinder, grate bars beneath the same, and means for discharging a blast of air in the direction of the grate bars, the forward portion of the grate bars having an inclination to force the blast rearward, and the rear portion of the grate bars having an inclination to reverse the direction of the blast to set up a counter current.

5. In a threshing machine, a cylinder, a grate beneath the cylinder, a sieve beneath the grate, and means for discharging a blast of air through the grate, and also in a substantially horizontal direction in the space between the grate and the sieve, and beneath the sieve, the grate having spaced slats which are set to deflect the grain downwardly and transversely to the direction of the air blast.

In testimony whereof I afiix my signature.

JOHN E. GROSS. 

